212003113021 has 4 divisors (see below), whose sum is σ = 242289272032. Its totient is φ = 181716954012.

The previous prime is 212003112949. The next prime is 212003113031. The reversal of 212003113021 is 120311300212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212003113021 - 2⁹ = 212003112509 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212003112986 and 212003113004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212003113031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15143079495 + ... + 15143079508.

It is an arithmetic number, because the mean of its divisors is an integer number (60572318008).

Almost surely, 2^212003113021 is an apocalyptic number.

It is an amenable number.

212003113021 is a deficient number, since it is larger than the sum of its proper divisors (30286159011).

212003113021 is an equidigital number, since it uses as much as digits as its factorization.

212003113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30286159010.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 212003113021 its reverse (120311300212), we get a palindrome (332314413233).

The spelling of 212003113021 in words is "two hundred twelve billion, three million, one hundred thirteen thousand, twenty-one".